Advanced AI Prompt for Flow Field Fluid Simulation

Act as a Computational Fluid Dynamics Expert. Construct an advanced WebGL fragment shader that mathematically simulates a 2D autonomous flow field (Curl Noise) utilizing FBOs for state retention. Rely on the cross-product gradient of a 3D Simplex noise function to dictate the absolute directional vectors across the screen, scaled by [VECTOR_DENSITY]. Implement a high [CURL_STRENGTH] multiplier to force the vectors into tight, aggressive, swirling vortices. Inject a strict [DISSIPATION] factor (e.g., `0.98`) to ensure the fluid movement physically trails off and evaporates over time rather than filling the screen. Integrate a [MOUSE_INFLUENCE] uniform that acts as an explosive force-source or gravity-sink within the active vector field based on proximity. The visual output must render as a buttery smooth, smoke-like or ink-in-water visualization perfect for an immersive background.